Mercurial > flash_v2
diff packages/devs/flash/powerpc/viper/current/src/flash_query.c @ 159:511f4dc167f6
Merge from eCos master repository on 2001-05-18-01:30:05-BST
| author | jlarmour |
|---|---|
| date | Fri, 18 May 2001 06:32:28 +0000 |
| parents | |
| children | e0c0827131d1 |
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new file mode 100644 --- /dev/null +++ b/packages/devs/flash/powerpc/viper/current/src/flash_query.c @@ -0,0 +1,87 @@ +//========================================================================== +// +// flash_query.c +// +// Flash programming - query device +// +//========================================================================== +//####COPYRIGHTBEGIN#### +// +// ------------------------------------------- +// The contents of this file are subject to the Red Hat eCos Public License +// Version 1.1 (the "License"); you may not use this file except in +// compliance with the License. You may obtain a copy of the License at +// http://www.redhat.com/ +// +// Software distributed under the License is distributed on an "AS IS" +// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the +// License for the specific language governing rights and limitations under +// the License. +// +// The Original Code is eCos - Embedded Configurable Operating System, +// released September 30, 1998. +// +// The Initial Developer of the Original Code is Red Hat. +// Portions created by Red Hat are +// Copyright (C) 1998, 1999, 2000, 2001 Red Hat, Inc. +// All Rights Reserved. +// ------------------------------------------- +// +//####COPYRIGHTEND#### +//========================================================================== +//#####DESCRIPTIONBEGIN#### +// +// Author(s): gthomas +// Contributors: gthomas +// Date: 2000-10-20 +// Purpose: +// Description: +// +//####DESCRIPTIONEND#### +// +//========================================================================== + +#include "flash.h" + +#include <pkgconf/hal.h> +#include <cyg/hal/hal_arch.h> +#include <cyg/hal/hal_cache.h> +#include CYGHWR_MEMORY_LAYOUT_H + +// +// CAUTION! This code must be copied to RAM before execution. Therefore, +// it must not contain any code which might be position dependent! +// + +int +flash_query(unsigned char *data) +{ + volatile unsigned char *ROM; + int cnt; + int cache_on; + + HAL_DCACHE_IS_ENABLED(cache_on); + if (cache_on) { + HAL_DCACHE_SYNC(); + HAL_DCACHE_DISABLE(); + } + + ROM = (volatile unsigned char *)0xFE000000; + + ROM[FLASH_Setup_Addr1] = FLASH_Setup_Code1; + ROM[FLASH_Setup_Addr2] = FLASH_Setup_Code2; + ROM[FLASH_Setup_Addr1] = FLASH_Read_ID; + + // Manufacturers' code + *data++ = ROM[0x00]; + // Part number + *data++ = ROM[0x02]; + + ROM[0] = FLASH_Reset; + + if (cache_on) { + HAL_DCACHE_ENABLE(); + } + + return 0; +}
